Hi Alexis, The state table API is relatively new feature and as such actively developed based on feedbacks. Without having an in-depth look I think this is something what is not yet covered. If you can create a super simple repro app I can take a detailed look and add support for it.
BR, G On Tue, Sep 9, 2025 at 4:24 PM Alexis Sarda-Espinosa < sarda.espin...@gmail.com> wrote: > Hello, > > I am looking at the new APIs for state processing [1] and I see custom > serde should be supported with a property like > "fields.#.value-type-factory". However, I'm not sure if that applies to > MapState. I have an operator with MapState using String as key but with a > custom type serializer for the values [2], and regardless of how I > define my value type factory, I get an exception stating that the new > serializer must be compatible with the old one, where both the old and new > serializers just mention its the map serializer. > > Am I missing something or is this actually not supported yet? > > [1] > https://nightlies.apache.org/flink/flink-docs-release-2.1/docs/libs/state_processor_api/#table-api > [2] https://gist.github.com/asardaes/714b8c1db0c4020f5fde9865b95fc398 > > Regards, > Alexis. >
